If `1^0=alpha` radians, then find the approximate value of `cos60^0 1^(prime)dot`

Find the approximate value of (0. 0037)^(1/2) .

If 1^(@)=0.017 radians, then the approximate value of sin 46^(@) , is

Write the principal value of cos^(-1)(cos680^0)dot

1 radian is approximately equal to

Using differentials, find the approximate value of (0. 007)^(1//3)

Using differentials, find the approximate value of (0. 009)^(1//3)

Write the principal value of cos^(-1)[cos(680^0)]dot

Find the approximate value of tan^(-1)(0.999) using differential.

The value of 60^@ in radian is

If the quadratic equation , 4^(sec^(2)alpha) x^(2) + 2x + (beta^(2)- beta + 1/2) = 0 have real roots, then find all the possible value of cos alpha + cos^(-1) beta .